5 Questions
What do positive inotropic drugs do?
Increase the force of myocardial contraction
What is the effect of negative chronotropic drugs?
Decrease heart rate by altering impulse formation at the SA node
What is the primary effect of catecholamines?
Increase heart rate and constrict peripheral blood vessels
What do antiarrhythmic drugs aim to correct?
Variation in the normal beating of the heart
What is quinidine?
An alkaloid obtained from cinchona plants
Study Notes
Cardiac Medications
- Positive inotropic drugs: Increase the force of contraction of the heart muscle, resulting in a stronger heartbeat.
- Negative chronotropic drugs: Decrease the heart rate, slowing down the heartbeat.
- Catecholamines: Have a primary effect of increasing the force and rate of the heartbeat, preparing the body for "fight or flight" responses.
- Antiarrhythmic drugs: Aim to correct abnormal heart rhythms, restore a normal heart rhythm and prevent irregular heartbeats.
- Quinidine: A type of antiarrhythmic drug, used to treat abnormal heart rhythms, including atrial fibrillation.
Test your knowledge of cardiovascular drugs with this quiz. Explore the types of cardiac drugs, including positive and negative inotropic drugs, as well as positive and negative chronotropic drugs. Learn about how these drugs affect myocardial contraction and heart rate.
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